Some standard content:
Military standard for the electronics industry of the People's Republic of China FL5860
General specification for solid-state lasers
SJ 20027—92
General specification for solid-state lasers1992-02-01 Issued
1992-05-01 Implementation
Ministry of Electronics Industry of the People's Republic of China
1 Scope
1.1 Subject matter
1.2 Scope of application
1.3 Classification
2 Referenced documents
3 Requirements
3.1 Detailed specifications
3.2 Definitions of terms
3.3 Abbreviations, quantities and units
3. 4Qualification appraisal
3.5Reliability
3.7Material
3.8Components
Laser·
Safety·
3.12Environmental requirements…
Marking·
4Quality assurance provisions
Inspection responsibility
4.2Inspection classification
4.3Inspection conditions
4.4First article inspection
Identification inspection (finalization inspection)
4.6Quality consistency inspection
4.7Packaging inspection·
Inspection method
4.9Other relevant requirements…．
5 Delivery preparation
5.2 Marking·
5.3 Transportation
S.4 Storage
6 Notes·
6.1 Definition·
6.2 Contents of order documents
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General specification for solid-state lasers for military use in the electronics industry of the People's Republic of China
General specification for solid-state lasers1 Scope
1.1 Subject content
SJ 20027-92
This specification specifies the general requirements, quality assurance regulations, delivery preparation, etc. for various types of military solid-state lasers (hereinafter referred to as lasers or products).
1.2 Scope of application
This specification applies to various types of lasers used for combat and military training and for confidentiality in the interests of national security. 1.3 Classification
1.3.1 Classification by matrix material
Solid-state lasers can be divided into crystal and glass types according to the matrix material of the working substance. a, Crystal type: ruby laser, neodymium-doped yttrium aluminum agate laser (Nd: YAG), neodymium-doped aluminate laser (Nd: YAP), etc.;
b, Glass type: silicate glass laser, phosphate glass laser, borate glass laser, etc. 1.3.2 Classification by hazard
Laser classification by hazard should comply with the provisions of Chapter 9 of GB7247 (Radiation safety, equipment classification, requirements and user guide for laser products).
Citations
GR 191
GR 2423.2
GE 2423.3
GB 2423.6
Packaging, storage and transportation pictorial marking
Basic environmental test procedures for electrical and electronic products Test A: Low temperature test method
Basic environmental test procedures for electrical and electronic products Test B: High temperature test method
Basic environmental test procedures for electrical and electronic products Test Ca: Damp heat test method
Basic environmental test procedures for electrical and electronic products Test Eb: Collision test method
GB2423.10Basic environmental test procedures for electrical and electronic products Test Fc: Vibration (sinusoidal) test methodGB2423.16
Electrical and electronic products Basic environmental test procedures Test J: Mildew test method
Ministry of Electronics Industry of the People's Republic of China Issued on February 1, 1992 Implemented on May 1, 1992
S20027-92
GB2423.17 Basic environmental test procedures for electric and electronic products Test Ka: Salt spray test method
GB2423.21 Basic environmental test procedures for electric and electronic products Test M: Low pressure test method
GB2423.22 Basic environmental test procedures for electric and electronic products Test N: Temperature change test method
GB 7247
GR10320
Radiation safety, equipment classification, requirements and user guide for laser products Electrical safety of optical equipment and facilities
GB/T15175 Test methods for main parameters of solid-state lasers GJB 179
GJB 431
SI3213
HB6161
3 Requirements
3.1 Detailed specifications
Counting sampling inspection procedures and tables
Product layering, product interchangeability, prototypes and related terms Basic test methods for transport packaging of general electronic products Automobile transport test General specifications for airborne solid pulse laser rangefinders The requirements for each model of product shall comply with the provisions of this specification and its detailed specifications. When there is a conflict between the provisions in this specification and the detailed specifications, the detailed specifications shall prevail.
3.2 Definition of terms
The definitions of terms in this specification adopt the corresponding national standards and national military standards. 3.3 Abbreviations, quantities and units
The abbreviations, quantities and units in this specification shall adopt the corresponding national standards and national military standards. 3.4 Qualification
Products submitted in accordance with this specification shall be products that have been qualified or approved for finalization. 3.5 Reliability
If the performance and design requirements specified in this specification are not sufficient to ensure the inherent reliability required by the product, the reliability requirements shall be specifically specified in the detailed specifications.
3.6 First article
First article refers to the first batch of laser samples (not less than 3 units) produced in trial production. If it is considered that first article inspection is crucial to verify whether the laser meets the requirements of the specification before regular production under the contract, the requirement for first article inspection shall be put forward in the contract or order, and the specific matters of first article inspection shall be specified. 3.7 Materials
3.7.1 General requirements for selected materials
The selected materials shall meet the requirements of the optical device performance design. a.
b. The selected materials shall meet the requirements of national standards, national military standards and relevant standards, and domestic standardized, serialized and universal materials shall be selected as much as possible:
c. If there are special requirements for materials such as anti-magnetism and radiation resistance, they shall be specified in the detailed specifications. d. The selected new materials shall have complete performance data and certificates of conformity. The parts manufactured with them shall be officially used only after they have passed the test and approval of the ordering party. e. Substitute materials should be fully tested or have reliable data to prove that they can ensure the performance of the laser. They can only be used after obtaining the consent of the ordering party. Materials not included in the standard shall not be used before the reliability is verified. g. For materials with mildew and corrosion resistance requirements, they should be treated with anti-corrosion and anti-rust treatment according to relevant standards, and the treatment should not reduce the electrical properties, mechanical properties, optical properties and other properties of the materials. h. Any materials that have exceeded the shelf life or materials that have expired and deteriorated without a shelf life shall not be used. i. The selected insulation materials should meet the requirements of laser use and storage in terms of temperature resistance, corrosion resistance, anti-corrosion, dielectric strength, dielectric constant, mechanical strength, consumption factor, moisture absorption and moisture permeability. 3.7.2 Matrix of laser working material
Matrix material used as laser working material shall be able to provide suitable coordination field for activated ions, and its mechanical properties, thermal conductivity, thermal expansion coefficient and thermal-optical stability shall meet the requirements of laser performance. 3.7.3 Sealing material (seal)
3.7.3.1 Sealing material shall have good sealing performance and stable physical and chemical properties, and shall have performance requirements such as corrosion resistance, impact resistance, vibration resistance, abrasion resistance, high temperature resistance and low temperature resistance. 3.7.3.2 Sealing material shall meet the environmental requirements of laser use, and ensure that the sealing performance index of laser remains unchanged within the specified service life and storage period.
3.7.3.3 Sealing materials with special requirements shall be specified in detailed specifications. 3.7.3.4 Sealing glue, sealing ring and other new materials shall comply with the provisions of 3.7.1d and 3.7.3.1. 3.7.4 Other materials
Requirements for other materials are specified in the detailed specifications. 3.8 Parts
3.8.1 Laser
Laser should be domestic standard parts, universal parts products, so that they can be replaced. Its varieties, specifications and technical parameters are specified in the detailed specifications.
3.8.2 Focusing cavity (pumping cavity)
3.8.2.1 General requirements
a. The structural design of the focusing cavity should take into account the convenience of inspection and maintenance. b. The structural design and processing requirements of the focusing cavity should take into account the focusing efficiency and illumination uniformity. 3.8.2.2 Reflecting surface of the focusing cavity
The following requirements for the reflecting surface of the focusing cavity should be specified in the detailed specifications. b. Reflectivity within the absorption spectrum of the working material; c. Processing accuracy of the geometric dimensions of the focusing surface and the surface roughness of the reflecting surface; c. Firmness and chemical stability of the reflective film layer (when applicable). 3.8.3 Pumping lamp
Pumping lamps should use domestic standard parts and general parts products so that they can be replaced. Its model specifications and technical parameters are specified in the detailed specifications. a.www.bzxz.net
The pumping lamp is charged with a high voltage of several hundred to several kV, and the triggering voltage is as high as 10,000. In order to ensure safety and smooth triggering, discharge between the lamp electrode and the adjacent conductor should be prevented. For this reason, the lamp electrode and the adjacent conductor should be insulated or leave a gap of at least 1 cm.
3.8.4 Resonant cavity
The resonant cavity includes a base, a reflector, and brackets for adjusting and fixing the optical components inside and outside the cavity. 3
3.8.4.1 Mechanical structure
S 20027-92
The mechanical structure of the resonant cavity should ensure that the optical components are accurately positioned and easy to adjust, and have a certain rigidity and stability with temperature changes.
, The resonant cavity should be dustproof, moisture-proof, anti-capsule, and impact-resistant: b. The parts inside and outside the cavity should be domestic standard parts and general parts products so that they can be replaced. Their model specifications and technical parameters are specified in the detailed specifications;
C. The adjustment brackets of the optical components inside and outside the cavity should not interfere with each other in the vertical and horizontal directions, can be self-locking, and have a certain temperature stability and mechanical stability. 3.8.4.2 Processing requirements for optical parts
Day. The processing requirements of optical parts are specified in the detailed specifications; h. The optical coating layer of optical parts should be firmly bonded to the substrate, the mechanical strength of the film layer should be high, and it can be cleaned and wiped. The chemical stability of the film layer should be good, and the threshold of anti-laser damage should be high. Specific requirements are specified by detailed specifications (when applicable). 3.8.5 Cooling system
The design of the cooling system should be practical and reliable and should meet the requirements of the working characteristics of the laser. 3.8.5.1 Cooling liquid
3.8.5.1.1 Physical and chemical properties of the cooling liquid a. Large heat capacity, high density, low freezing point, low viscosity, high thermal conductivity, and small volume expansion coefficient to ensure the normal operation of the laser.
Transparent within the working spectrum range:
C Non-flammable and non-explosive. No corrosion to copper, lead and its gold, silver, chromium, rubber, glass, etc.; d. Good chemical stability.
3.8.5.1.2 Cooling liquid flow
The cooling liquid flow per minute shall be specified in the detailed specifications. 3.8.5.2 Cooling
The selected cooling pump shall be a domestic standard part for easy maintenance and replacement. Its model and specifications shall be specified in the detailed specifications. 3.8.5.3 Cooling gas
The composition and flow per minute of the cooling gas shall be specified in the detailed specifications. 3.8.5.4 Conduction cooling
The heat conductor and the cooled body must be in close contact uniformly and consistently to make the overall temperature of the laser working material as uniform as possible. The conductor material shall be specified in the detailed specifications. 3.9 Power supply
The design requirements and main performance requirements of the laser power supply shall be specified in the detailed specifications. 3.10 Light Invitation Device
3.10.1 Appearance Quality
a. The outer surface should be cleaned and decorated, without rust, accumulation of sealant and grease, obvious damage and other defects that affect the appearance or performance; b. The outer surface treatment layer should not fall off, damage, peeling, blistering, cracking and flow marks, and the color of each part should be consistent; c. The inner and outer surfaces of the window protective glass should be clean, without scratches and cracks; the opening and closing of the movable window cover should be appropriate and reliable.
3.10.2 Connection Parts
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SJ 20027 -92
a. The threaded connection parts should be intact and reliable, and the screwdriver slot, wrench hole and fixing pin should not be fluffy or scratched. The size of screws, nuts and pins shall comply with the provisions of the detailed specifications: b. The fasteners shall be in close contact with the supporting surface of the fastened parts, and there shall be no looseness or misalignment. Unless otherwise specified, the gaps of fixed connection parts shall be sealed with sealant or sealing rings. 3.10.3 Maintenance
The relevant piano parts of the laser shall be able to be repaired or replaced. After repair or replacement, their performance shall be tested and shall not deteriorate. During the use of the light-removing rod, the light-transmitting surface is often damaged due to various reasons. For this reason, the laser rod needs to be repaired or replaced (see 3.8.1)
b. The internal and external parts of the resonant cavity shall be able to be repaired or replaced when they lose their function (see 3.8.4.1 b); c. The pump lamp shall be replaceable (see 3.8.3 a); d. The focusing cavity shall be repairable (see 3.8.2.1 a) 3.10.4 Performance characteristics
3.10.4.1 Mechanical properties
The laser requires a compact structure, firmness and durability. After the severe environmental test (test conditions see 4.3 a; test methods see 4.8.2), the appearance quality (see 3.10.1) should not be deteriorated (test methods see 4.8.1); other mechanical properties should comply with the provisions of the detailed specifications.
3.10.4.2 Optoelectronic performance
3.10.4.2.1 The relevant parameters and parameter indicators should be specified in the detailed specifications of different types of lasers. Parameter test conditions see 4.3 b; test methods see 4.8.3. 3.10.4.2.2 The optoelectronic parameters of the laser should be stable and reliable. During or after the severe environmental test (test conditions see 4.3; test methods see 4.8.2), the parameters specified in the test should comply with the provisions of the detailed specifications (test conditions see 4.3 b, c; test methods see 4.8.3).
The parameters to be tested during or at the end of one or more environmental tests shall be determined by the detailed specification within the parameter ranges specified in 3.10.4.2.1. 3.10.4.2.3 Those performance parameters within the ranges specified in 3.10.4.2.1 that are most susceptible to changes in the production process or production skills and are critical for the laser to meet the intended use requirements shall be listed by the detailed specification as the optoelectronic parameters of Group A inspection.
3.10.4.2.4 Those performance parameters within the ranges specified in 3.10.4.2.1 that are more affected by component quality and less affected by the production process or production skills shall be listed by the detailed specification as the optoelectronic parameters of Group B inspection. In general (unless otherwise specified), parameters other than those of Group A inspection within the ranges specified in 3.10.4.2.1 are parameters of Group B inspection.
3.10.4.2.5 The parameters (one or several items) used to assess the working life of the laser within the scope of 3.10.4.2.1 shall be determined by the detailed specification.
3.10.4.2.6 The parameters used to assess the laser packaging and transportation test within the scope of 3.10.4.2.1 shall be determined by the detailed specification.
3.10.5 Life
a. The working life hours of the laser shall be specified in the detailed specification: b. The life assessment parameters of the skimmer (see 3.10.4.2.5) shall be specified in the detailed specification; t. The storage life time of the laser shall be specified in the detailed specification: 3.10.6 Weight
SJ 20027-92
The weight and dimensions of the laser shall be specified in the detailed specification. 3.11 Safety
3.11.1 Electrical safety
The electrical safety of the laser shall comply with the relevant provisions in Chapter 4 of GB10320. 3.11.2 Radiation safety
, the laser radiation safety classification shall comply with the provisions of Chapter 9 of GB7247 (see 1.3.2); b, the engineering technical requirements for laser radiation safety shall comply with the requirements of Chapter 4 of GB7247; c, the laser auxiliary radiation safety marking shall comply with the provisions of Chapter 5 of GB7247. 3.11.3 Specific safety design requirements (when applicable) a, the safety assembly requirements of the pump lamp are as specified in 3.8.3 b; b. An interlock protection device shall be installed between the cooling pump power supply and the pump lamp power supply to ensure that the pump lamp power supply can only be started after the cooling pump is started.
3.12 Environmental requirements
3.12.1 Storage
a. The temperature of the warehouse should be -30～+60t, and the humidity should not exceed 80%; b. The warehouse should have good lighting facilities; c. The warehouse building should have good earthquake resistance, fire prevention, ventilation and other facilities. 3.12.2 Operation
The laser shall be able to operate normally in various harsh environments specified in the detailed specifications. After the specified harsh environment test (see Table 1 and Table 4), the laser shall: a. Have reliable mechanical properties (see 3.10.4.1); b. Have reliable photoelectric properties (see 3.10.4.2.2); c. Have clear and firm markings (see 3.13). 3.13 Marking
Unless otherwise specified, each laser shall be firmly and clearly marked with the following markings upon delivery. 3.13.1 Safety marking
Safety markings shall comply with the provisions of Chapter 5 of GB7247 (see 3.11.2C): a. Instruction markings; b. Warning markings; c. Window markings; d. Board markings: e. Safety interlock plate marking,
3.13.2 Model name and manufacturing year and month
Each laser and its product manual shall be marked with the model name and manufacturing year and month of the laser. The model naming method shall comply with the relevant standards.
3.13.3 Manufacturer’s name, code or trademark Each laser and its product manual shall have the manufacturer’s name, code or trademark. The manufacturer’s name, code or trademark used by the manufacturer shall be filed with the appraisal agency during the appraisal. 3.13.4 Military marking「\
All lasers that meet the requirements of this specification and detailed specifications shall be marked with military markings 6
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SJ2002792
“J\. The test data of lasers with military markings shall be well preserved by the manufacturer for a period of not less than 2 years, and the relevant departments may check them at any time when necessary.
3.13.5 Quality Certification Mark
For all optical devices that meet the quality certification requirements for Chinese military electronic components, the quality certification mark confirmed by the superior relevant departments shall be attached to the laser and its product manual. 3.13.6 Batch Identification
Lasers without serial numbers shall be marked with batch identification codes. Batch identification codes are limited to Arabic numerals and Latin letters, or both.
4 Quality Assurance Provisions
4.1 Inspection Responsibilities
Unless otherwise specified, the contractor shall be responsible for all inspections specified in this specification. If necessary, the ordering party or the superior certification agency has the right to inspect any inspection item described in the specification. 4.1.1 Qualified Responsibilities
All lasers must meet all requirements of Chapter 3 and Chapter 5 of this specification. The inspections specified in this specification shall become an integral part of the contractor's entire inspection system or quality management. If the contract includes the inspection requirements specified in this specification, the contractor shall also ensure that the optical devices submitted for acceptance meet the contract requirements: Quality consistency sampling does not allow the submission of lasers that are known to be defective, nor can the contractor be required to accept defective lasers. 4.1.2 Submission of lasers
4.1.2.1 The products submitted by the contractor must be lasers that have been approved by the superior appraisal agency for design finalization, production finalization or transferred to the factory for appraisal.
4.1.2.2 The lasers submitted by the contractor must be lasers that have been inspected and qualified by the inspection department of the unit according to the product drawings and the requirements of various levels of specifications and relevant technical conditions, and necessary inspection and test records shall be attached. 4.1.2.3 The products submitted by the contractor must be in batches. Unless otherwise specified, the inspection batches, batch composition and submission shall comply with the relevant provisions of GJB179.
4.1.3 Re-inspection before delivery
Optical devices that have passed the quality-consistency inspection and have been stored in the factory for more than 24 months shall be re-inspected by the manufacturer according to the entire process of Group A inspection (see 4.6.4.1.2) before delivery. Unqualified products shall be eliminated. 4.2 Inspection classification
The inspections specified in this specification are divided into:
a First article inspection;
b Appraisal inspection (type inspection):
c Quality consistency inspection.
4.3 Inspection conditions
a, unless otherwise specified, various tests shall be carried out in accordance with the relevant provisions of GB2423 and the specific provisions in the detailed specifications; h, unless otherwise specified, various optoelectronic parameters shall be tested in accordance with the provisions of Chapter 4 of GB/T15175--94: c, during one or several consecutive environmental tests or at the end of the test, the test items when the parameters need to be tested shall be specified in the detailed specifications. These specified test parameters (see 3.10.4.2.2, which should be tested before entering the test (see 4.3b for test conditions and 4.8.3 for test methods) are as follows (parameter indicators comply with the provisions of detailed specifications): d. The parameter measurement conditions for laser radiation safety classification should comply with the provisions of GB7247 Article 8.2 and this standard Article 4.3b7
.
l 2002792
e. Other inspection conditions specified in the detailed specifications. 4.4 First-article inspection
, if the first-article inspection requirement is put forward in the contract or order (see Article 3.6), the first-article inspection shall be carried out in accordance with the regulations. Its inspection rules, inspection items, inspection sequence, number of inspected items, required data and qualification criteria shall be specified in the contract or order.
If the first-article inspection requirement is not mentioned in the contract or order, it is generally replaced by design finalization inspection [see Article 4.5b.
),
4.5 Appraisal inspection (finalization inspection)
Appraisal inspection is sufficient to comprehensively evaluate whether the quantity of new products meets the tactical and technical requirements and whether the factory has the ability and means for mass production.
General situation: Appraisal inspection is divided into design finalization inspection and production finalization inspection. Design finalization inspection can be replaced by first-article inspection. When the product passes the design finalization inspection and the relevant requirements are complete, the tooling mold The first step is to have batch production capacity before mass production can be put into batch production, and the product should be subject to production finalization inspection. The identification inspection should be carried out in a laboratory recognized by both the product manufacturer and the purchaser. The identification inspection should be carried out in any of the following situations: a. The laser design is finalized and the production is finalized; h. The performance and quality of the laser have undergone major changes compared with the original identification inspection; c. The main structure and process of the laser have been changed; d. The laser has been shut down for a long time and then put into production again or transferred to another factory; e. The superior identification agency proposes to conduct identification inspection 4.5.1 Samples
The samples should be randomly selected from the production batch, and should be lasers produced with the equipment and normal process normally used during production.
4.5.1.1 Number of samples
a: The samples used for design finalization are generally not less than one laser terminal, and the samples used for production finalization are generally not less than one laser terminal. 4.5.2 Inspection rules
Unless otherwise specified, the number of samples should be in accordance with Table 1 Table 1 Identification test
Appearance quality
Connection
Maintainability
【Chapter】
Methods and conditions
(Cited chapter or other standard)
4.3c:4.8.6
4.8.1;*,8.3;4,3b
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Photoelectric performance
Electrical safety
Radiation safety
Specific safety
Design requirements
Environmental requirements\
ST 20027 -92
Continued Table 1
(Chapter)
3.10.4.2.
3.H.2 Article a
3. 11.2 Article nc
Methods and conditions
(Cited chapter or its official standard)
Measurement and weight method: 4.3 Article c
4.8.3; 4.3 Article h
GB 10320 Chapter 5
4.3 Article d; 4.8.3
4.8.1:4.8.6
4.3 Article a, bc, c
4. 8.2 Article b, a, d, c, f, g, e, h, i,j:4.8.1t4.8.3
Note: During the environmental test, the samples are divided into 3 groups and tested separately. The first group is tested in the order of b, a, dc in 4.8.2; the second group is tested in the order of tg in 4.8.2; the second group is tested in the order of e, 5, 1, c in 4.8.2. During the design finalization, each group of samples shall have at least one laser; during the production finalization, each group of samples shall have at least 3 lasers. 4.5.3 Failed the identification test
The samples tested in the identification test shall be tested in accordance with 4.5.After the inspection of the contents specified in Article 2, if any laser fails to meet the specified technical requirements, it shall be judged as a failure of the identification test. The contractor shall analyze the reasons, improve the process methods and quality assurance measures, and make necessary repairs to the failed characteristics. When the above problems existing in the batch of lasers are indeed overcome, the identification test can be re-submitted in accordance with the provisions of Articles 4, 5.1 and 4.5.2. If the new inspection test is required, the ordering party shall decide which items to be inspected.
4.5.4 Maintenance of Qualification of Identification
In order to maintain the identification approval, the contractor shall submit a proposed report to the identification agency every 24 months. The identification agency shall specify the date for the start of report submission. If the report is not submitted within 30 days after the end of each 24-month period, the identification agency may revoke the identification approval of the product.
4.5.4.1 Discontinuous batches
If the contractor wants to discontinue the production of one or all models of lasers, it can continue to be retained in the qualified product log as long as there is still inventory. The contractor shall notify the relevant ordering parties within 30 days after the last batch of lasers are all shipped out. The contractor may store the last batch of lasers, and when the inventory is sold out, the certification agency shall be notified to delete this product from the qualified product catalog. 4.6 Quality consistency inspection
Unless otherwise specified, a batch of products put into production shall be subject to the following quality consistency inspections in sequence: a. Material inspection:
b. Component inspection;
c. Power supply inspection:
t: Laser inspection.
4.6.1 Material inspection
SJ 20027 -- 92
To ensure that the quality of the laser meets the requirements, the laser contractor shall inspect and accept the materials in accordance with the requirements of Article 3.7 during the laser manufacturing process.
4.6.2 Component inspection
Each component shall be inspected and accepted item by item according to the requirements of Articles 3 and 8 before the laser is assembled to ensure the quality of the laser.
4.6.3 Power supply inspection
Power supply inspection is specified in the detailed specification.
4.6.4 Laser inspection
4.6.4.1 Batch inspection
Batch inspection should include group A and group B inspection.
4.6.4.1.1 Inspection batch
“Inspection batch\ is defined as all lasers of the same model, same process, same material and same performance that are produced and submitted for inspection under basically the same conditions within a one-month period. 4.6.4.1.2 Group A inspection
Group A inspection shall be carried out in accordance with the inspection contents and sequence specified in Table 2. Table 2 Group A inspection
Inspection contents
Appearance quality
Connection parts
Maintainability
Photoelectric characteristics
(Chapter)
3.10.4.2.3
Methods and conditions
(Cited chapter)
4.8.1;4.8.3:4. 3.b
Sample method
100% inspection
100% inspection
4.6.4.1.2.1A inspection shall be carried out on all products submitted in accordance with this specification. All nonconforming products (products that do not meet the technical requirements) shall be eliminated. Batches rejected due to more than 5% nonconforming products shall not be supplied according to the contract.
4.6.4.1.2.2 The reasons, improvement measures and elimination of all nonconforming products shall be recorded for rejected batches and then submitted for inspection in the original order. If more than 5% of nonconforming products are still accepted after re-inspection, the batch of lasers shall not be submitted again. 4.6.4.1.3 Group B inspection
Group B inspection shall be carried out according to the items and frequency specified in Table 3: These items should be carried out on samples that have been submitted and passed the Group A inspection.
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